CLOSED COOLING
SERVICE MANUAL NUMBER 30
Pressure Cap Maintenance
Pressure cap is designed to maintain pressure in fresh water section of closed cooling
system once the engine has attained normal operating temperature. This raises the boiling
point of the coolant, thereby increasing the efficiency of the cooling system. To help ensure
proper operation, cap should be cleaned and inspected periodically.
WARNING
Allow engine to cool before removing pressure cap, as sudden loss of pressure
could cause hot coolant to boil and discharge violently. After engine has cooled,
turn cap 1/4 turn to allow any pressure to escape slowly, then remove cap.
1.
2.
3.
Remove pressure cap from coolant reservoir.
Wash cap with clean water to remove any deposits or debris.
Inspect cap for cuts, cracks or other signs of deterioration. Replace cap if necessary.
a
77631
a - Reservoir Pressure Cap
4.
5.
Clean sealing surfaces on coolant reservoir. Inspect surfaces for any damage or depos-
its that may prevent cap from sealing properly.
Reinstall pressure cap, tighten securely.
Seawater Pickup Pump Maintenance
Whenever insufficient water flow is suspected, seawater pickup pump should be disas-
sembled and inspected.
INDEX
Page 6A-6
90-863161 SEPTEMBER 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
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Great down load . it was all there an more